NAME¶

libqcow.h — Library to access the QEMU Copy-On-Write (QCOW) image file format

SYNOPSIS¶

#include <libqcow.h>

Support functions
const char *
libqcow_get_version(void);

int
libqcow_get_access_flags_read(void);

int
libqcow_get_access_flags_read_write(void);

int
libqcow_get_access_flags_write(void);

int
libqcow_get_codepage(int *codepage, libqcow_error_t **error);

int
libqcow_set_codepage(int codepage, libqcow_error_t **error);

int
libqcow_check_file_signature(const char *filename, libqcow_error_t **error);

Available when compiled with wide character string support:
int
libqcow_check_file_signature_wide(const wchar_t *filename, libqcow_error_t **error);

Available when compiled with libbfio support:
int
libqcow_check_file_signature_file_io_handle(libbfio_handle_t *bfio_handle, libqcow_error_t **error);

Notify functions
void
libqcow_notify_set_verbose(int verbose);

int
libqcow_notify_set_stream(FILE *stream, libqcow_error_t **error);

int
libqcow_notify_stream_open(const char *filename, libqcow_error_t **error);

int
libqcow_notify_stream_close(libqcow_error_t **error);

Error functions
void
libqcow_error_free(libqcow_error_t **error);

int
libqcow_error_fprint(libqcow_error_t *error, FILE *stream);

int
libqcow_error_sprint(libqcow_error_t *error, char *string, size_t size);

int
libqcow_error_backtrace_fprint(libqcow_error_t *error, FILE *stream);

int
libqcow_error_backtrace_sprint(libqcow_error_t *error, char *string, size_t size);

File functions
int
libqcow_file_initialize(libqcow_file_t **file, libqcow_error_t **error);

int
libqcow_file_free(libqcow_file_t **file, libqcow_error_t **error);

int
libqcow_file_signal_abort(libqcow_file_t *file, libqcow_error_t **error);

int
libqcow_file_open(libqcow_file_t *file, const char *filename, int access_flags, libqcow_error_t **error);

int
libqcow_file_close(libqcow_file_t *file, libqcow_error_t **error);

int
libqcow_file_is_locked(libqcow_file_t *file, libqcow_error_t **error);

ssize_t
libqcow_file_read_buffer(libqcow_file_t *file, void *buffer, size_t buffer_size, libqcow_error_t **error);

ssize_t
libqcow_file_read_buffer_at_offset(libqcow_file_t *file, void *buffer, size_t buffer_size, off64_t offset, libqcow_error_t **error);

off64_t
libqcow_file_seek_offset(libqcow_file_t *file, off64_t offset, int whence, libqcow_error_t **error);

int
libqcow_file_get_offset(libqcow_file_t *file, off64_t *offset, libqcow_error_t **error);

int
libqcow_file_set_parent_file(libqcow_file_t *file, libqcow_file_t *parent_file, libqcow_error_t **error);

int
libqcow_file_get_format_version(libqcow_file_t *file, uint32_t *format_version, libqcow_error_t **error);

int
libqcow_file_get_encryption_method(libqcow_file_t *file, uint32_t *encryption_method, libqcow_error_t **error);

int
libqcow_file_set_keys(libqcow_file_t *file, const uint8_t *key, size_t key_size, libqcow_error_t **error);

int
libqcow_file_set_utf8_password(libqcow_file_t *file, const uint8_t *utf8_string, size_t utf8_string_length, libqcow_error_t **error);

int
libqcow_file_set_utf16_password(libqcow_file_t *file, const uint16_t *utf16_string, size_t utf16_string_length, libqcow_error_t **error);

int
libqcow_file_get_media_size(libqcow_file_t *file, size64_t *media_size, libqcow_error_t **error);

int
libqcow_file_get_utf8_backing_filename_size(libqcow_file_t *file, size_t *utf8_string_size, libqcow_error_t **error);

int
libqcow_file_get_utf8_backing_filename(libqcow_file_t *file, uint8_t *utf8_string, size_t utf8_string_size, libqcow_error_t **error);

int
libqcow_file_get_utf16_backing_filename_size(libqcow_file_t *file, size_t *utf16_string_size, libqcow_error_t **error);

int
libqcow_file_get_utf16_backing_filename(libqcow_file_t *file, uint16_t *utf16_string, size_t utf16_string_size, libqcow_error_t **error);

int
libqcow_file_get_number_of_snapshots(libqcow_file_t *file, int *number_of_snapshots, libqcow_error_t **error);

Available when compiled with wide character string support:
int
libqcow_file_open_wide(libqcow_file_t *file, const wchar_t *filename, int access_flags, libqcow_error_t **error);

Available when compiled with libbfio support:
int
libqcow_file_open_file_io_handle(libqcow_file_t *file, libbfio_handle_t *file_io_handle, int access_flags, libqcow_error_t **error);

DESCRIPTION¶

The libqcow_get_version() function is used to retrieve the library version.

RETURN VALUES¶

Most of the functions return NULL or -1 on error, dependent on the return type. For the actual return values see "libqcow.h".

ENVIRONMENT¶

None

FILES¶

None

NOTES¶

libqcow can be compiled with wide character support (wchar_t).

To compile libqcow with wide character support use: ./configure --enable-wide-character-type=yes
or define: _UNICODE
or UNICODE
during compilation.

LIBQCOW_WIDE_CHARACTER_TYPE
in libqcow/features.h can be used to determine if libqcow was compiled with wide character support.

BUGS¶

Please report bugs of any kind on the project issue tracker: https://github.com/libyal/libqcow/issues

AUTHOR¶

These man pages are generated from "libqcow.h".

COPYRIGHT¶

Copyright (C) 2010-2024, Joachim Metz <joachim.metz@gmail.com>.

This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO¶

the libqcow.h include file